I was searching the board and found a couple posts on this but they didn't really fit the format I was doing derivatives in. $\displaystyle F(x)=-1/(x^2+5)$ is my function. For the first derivative I have $\displaystyle F(x)=2x/(x^2+5)^2$. For some reason, all of my answers I get for the second derivative are wrong. Can anyone show me the steps you take to get to it?